Office workflow macro

[Nessie]

Hi. I'm not sure if this is a good place to ask, if not I would apreciate if you could move the topic to the proper place. 

I have a small office problem. I'm required to change " - " to "-" in over 17k positions in our dektop app. Unforcunately I dont have access to do it in a database. My only option is just simply clicking though it. The workflow is quite simple its just.... EDIT --> find " - " in 2 boxes --> remove the spaces --> save --> repeat. I was thinking about writing a macro to do it but I'm not rly sure how to get to it. Would someone have any recomendations? It would have to be a macro assigned to one of my keyboards keys (the keyboard is a basic office one). It would have to work basicly like a "find and replace" function but in chrome (the app is web based) 

Would rly apreciate and help. Plz dont kill me if for pourly wording things I hope its understandable 

 

EDIT: the other option would be just a simple macro to execute : backspace --> left arrow --> backspace (or backspace--> backspace --> backspace--> "-" but the full find and replace macro would be the best option